High 7.7Published Jul 8, 2026

CVE-2026-55874SeaweedFS: Path traversal in the S3 gateway X-Amz-Copy-Source header allows cross-bucket object read

Updated under an hour ago (Oct 26, 2026, 2:30 PM ET)

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It affects seaweedfs. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for seaweedfs

Exploited in the last 30 days

SeaweedFS is a distributed storage system. Prior to 4.34, the S3 API gateway does not reject dot-dot path segments in the X-Amz-Copy-Source header used by CopyObject and UploadPartCopy, allowing an authenticated identity scoped to one bucket to read objects from other buckets through server-side copy. This issue is fixed in version 4.34.

CVSS: 7.7 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Weakness (CWE): CWE-22
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Jul 8, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

seaweedfs seaweedfs seaweedfs:seaweedfs (from the name)	before 4.34	CNA record

References

References

https://github.com/seaweedfs/seaweedfs/security/advisories/GHSA-56wq-x3wv-3ff4	x-refsource-confirm
https://github.com/seaweedfs/seaweedfs/pull/9929	x-refsource-misc
https://github.com/seaweedfs/seaweedfs/commit/b44cf51fe931bd75aa4d37ae766bea90d7f85ccd	x-refsource-misc
https://github.com/seaweedfs/seaweedfs/releases/tag/4.34	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.